. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. DE VILLIERS: ASCAPHUS TRUEI STEJNEGER 11 and the lamina inferior of the crista intermedia. The ductus nasolac- rimaHs therefore opens equally into the diverticulum of the infundib- ulum and into the lateral portion of the cavum medium. The situa- tion of the main duct is more or less as described and figured by Gaupp (op. cit., 1904) on pp. SSO and 881, but the openings on the optic side nsuimt. <Xnn. FiQ. 3, A and B. Transverse sections through the nasal cava of Ascaphus^ cim = crista intermedia; cvi = cavum infer
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. DE VILLIERS: ASCAPHUS TRUEI STEJNEGER 11 and the lamina inferior of the crista intermedia. The ductus nasolac- rimaHs therefore opens equally into the diverticulum of the infundib- ulum and into the lateral portion of the cavum medium. The situa- tion of the main duct is more or less as described and figured by Gaupp (op. cit., 1904) on pp. SSO and 881, but the openings on the optic side nsuimt. <Xnn. FiQ. 3, A and B. Transverse sections through the nasal cava of Ascaphus^ cim = crista intermedia; cvi = cavum inferius (mainly recessus medialis); cvm = cavum medium; cvp = cavum prineipale; dnl = ductus nasolacrimalis; glim = glandula intermaxillaris; if = infundibulum; Is = lamina superior cristae intermediae; nednl = nasal end of ductus nasolacrimaUs; pit = planum termi- nale; spm = septomaxillary. Other abbreviations as for previous figures. are different. Caudally the duct splits into two ductlets (Fig. 4A), a dorsal and a ventral, as in Rana; these ductlets lie in the ventral eyelid and dorsal to the transitional cartilage between the processus maxil- laris posterior and the arcus subocularis. The dorsal, slightly smaller ductlet is the first to efl'ect an opening, which is situated in a groo^â e on top of the lower eyelid (Fig. 4B), instead of "an der tiefsten Stelle desselben," as in Rana. The end of the lower ductlet is bent slightly. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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